Smoking pipe



Sept. 30, 1952 p GUSTAFSON 2,612,173

SMOKING PIPE y Filed July 20, 1948 jg J- X/ 1 g) y Patented Sept. 30, 1952 UNITED STATES PATENT OFFICE Peter Gustafsom-Chicago, Ill.

Application July 20, 1948,'Serial No. 39,620

The present invention relates to smoking pipes, and this disclosure comprises an improvement over the smoking pipe disclosed and claimed in my copending application, Serial No. 39,619, led July 20, 1948.

` .In the other application it is pointed out that the long existing problem of preventing the formation of tars and nicotine-containing residues in the smoke passages of a pipe can successfully be solved by the utilization of a ventilating pump, manufactured as an integral part of the pipe and arranged to force air through the smoke passages of the pipe to eject the liquid condensate therefrom before the condensate .is allowed to evaporate and form sticky or gummy residues.

.It is the specific object of the present invention to yprovide an improved smoking pipe, of the general style disclosed in the above identified application, but so designed and constructed as to permit the reciprocating plunger of the pump to rest in its innermost positionin the pump cylinder during smoking, yet to be in a position wherein it is effective to force air through the smoke passages and ventilate said passages on its first stroke; so thaty initial movement of the pump plunger does not draw vapors from the smoke passages into the pump cylinder. In this connection, it may be explained that in order to keep the interior passages ofv the pipe entirely free of residues, it is desirable to avoid any possibility of drawing even a small amount of smoke, or liquid condensate, from the smoke passages into the cylinder of the pump. This is avoided in my other disclosure by keeping the piston rod in its withdrawn position during smoking, so that the piston is normally at rest at the beginning of its stroke, but in certain styles of pipes this is disadvantageous; and it is accordingly the object of the present invention to provide a means whereby the piston may be reciprocated without drawing vapor or -air from the smoke passage into the cylinder, but will effectively force air through the smoke passages in unidirectional ow, to eject any vapor and condensate from the passages.

l'I'he present preferred embodiment of the invention is illustrated in the drawings attached to and forming a part of this specification, wherein:

' Figure l is a central sectional view of a-smoking pipe constructed in accordance with these teachings; v A

l Figure 2 is an enlarged detail sectional view of the air pump, as contemplated by this invention,

3 Claims. (Cl. 131v184) with the piston at a positionV intermediate the ends of its stroke; and v Figure 3 is a detail sectional view taken substantially on the plane of the line 3-3 of Figure 2.

The pipe includes a bowl I0 and stem II wit a mouthpiece I2, in whicha hollow metal tube I4 is mounted. The tube supports the mouthpiece and extends through a bore in the stem to apoint under the bowl I0. 'I'he tube I4 is perforated at I5 to provide an orifice to communicate with the bottom opening I 6 of the bowl, so that smoke from the burning tobacco may be drawn through the tube andout through the channel I 'I of the mouthpiece. The tube extends beyond the opening I6, however,'and is provided near its extreme end with another opening I8 which serves as an air port adapted to communicate with an air passage I9 from the end of a small pump cylinder 2I, in which a piston 22` is slidably mounted. The end of the lpump cylinder is closed in any convenient manner, as by a plug 23, and a slide rod 24 and knurled knob 25 are 'provided so that the piston 22 may be manually manipulated to force air from the pump cylinder through the tube I4 and orifice I1 of the stem on its inward stroke, and to draw fresh air into the pump cylinder on the return stroke. The slide rod 24 extends through an aperture 23a of the plug 23. The plug 23 may be loosely tted on the rod 24 so that air may iiow through the aperture in the vplug as the pump is operated.

' -It will be noted when the pipe is in the normal smoking position, illustrated in Figure l, the opening I8 is closed by the wall of the bowl, so that no condensate will accumulate in the pump cylinder, yet the orifice I5 in the tube is unobstructed to complete a smoke passageway from the pipe bowl I0 through the tube I4 inthe stem and through the channel I'I in the mouthpiece I2, By rotating` the mouthpiece I2 a quarter turn, the oriiice I5 maybe closed'off and the air 'port' I8 of the tube brought into communication with the air passage I9 ofthe pump, so that the interior 'of the tube I4 and channel I'I of the mouthpiece are in unobstructed communication with the pump cylinder 2 I.

The rod24 is of substantial diameter andA is provided with a central bore 26, extending completely throughffrom the piston 22 to the end of the knob 25 to provide unrestricted air communication between the inside of the cylinder 2| also much shorter; so that the resistance to air flowing through the bore 26 is far less than the combined resistance of the channel I1 and tube I4. Thus, in operation, when the knob 25 is withdrawn to move the piston 22 outwardly, the initial flow of air to fill the cylinder of the pump will be drawn inwardly through the bore 26 into the cylinder, rather than through the smoke passages. In effecting the return stroke, the operator will move the piston inwardly by placing the end of his finger on the knob -25 and pressing it in. This will effectively close the outer end of the bore 26 during the full stroke,

so that, as the piston 22 and knob 25 are moved inwardly, the air from the cylinder 2| will be forced outwardly from the pump cylinder through the tube I4 and the channel I1.. The` movement of air through the smoke tube and mouthpiece will eject liquid condensate therein, and effectively clear the smoke passages of smoke or lingering vapor.

The air capacity of the cylinder 2| should be somewhat greater than the entire volume of the smoke 'passage between the orifice I5 and the end of the mouthpiece, so that all of the condensate and smoke residues or -vapors may be ejected in a single stroke. It is understood. of course, that subsequent strokes may be desirable for the. purpose of further Ventilating the smoke passage and drying its interior surfaces, but in any-event the manipulation of the piston in the manner indicated effects a flow of air through the smoke passages, so that there is no possibility ofanyresidues or vapors being drawn into the pump cylinder. l' 2 It should be apparent from the foregoing description that the teachings from this invention provide a specific combination and arrangement of parts adapted to move fresh air through the smoke passages of a smoking pipe, so that the passages may be maintainedin a clean, fresh and sanitary condition, and at the same time so arranged to effectively prevent the possibility of residues accumulating in the cylinder pump. The several parts of the pipe are so related that the assembly may be of neat, compact and streamlined appearance, yet incorporate the mechanical features necessary to accomplish the desired results.

Having thus described the invention, ,what I claim as new and desire to protect by United States Letters Patent is:

l. A smoking pipe having, in combination, a

tobacco bowl, a mouthpiece, a smoke passage means between the bowl and the mouthpiece, and an air pump integral with, and below said bow-l, and parallel with saidV smoke passage means, said pump having a hollow piston rod, a longitudinally movable piston carried at the inne-r end of the hollow rod, the bore of the hollow piston rod being located between the pump cylinder and the atmosphere, and anv opening comprising an air passage at one end of the pump cylinder communicating with a coinciding opening in said smoke passage means comprising an .air port wherebyair may be caused to fiow unrestrictedly into the cylinder .during outward movement of the piston and the bore may be manually .closed during inward movementvtoafford air circulation through the smoke passages vof the pipe by the action of said pump.

2. A smoking pipe comprising, a tobacco bowl .and an integral stem wherein an opening in said bowl communicates with a bore in said stem, a channeled .mouthpiece rotatable on the end of 'trable with said tube air port when said tube orifice is sealed by the bottom portion of said bowl, a piston in said cylinder, a tubular piston rod extending outwardly through the head of said cylinder and terminating in a manually operable head through which the bore in said piston rod communicates with the ambient atmosphere, said bore being adapted to be closed by a finger of the operator during the inward stroke of the piston for forcing a portion of the air in said cylinder and rod outwardly through the bore in said stem and the channel in said mouthpiece when said air port and air passage are in registration,

3. A smoking pipe comprising, a tobacco bowl and an integral stem wherein an opening in said bowl communicates with a bore in said stem, a channeled mouthpiece rotatable on the end of said stem, a tube secured to said mouthpiece and extending into said stem bore to a point beyond said bowl opening, said tube having circumferentially and axially spaced orifice and air port. said orifice being positioned for either registering with said bowl opening or being sealed by the bottom portion of the bowl when rotated out of vregistry with the opening therein, a pump cylinder below said bowl having an air passage registrable with said tube air port when said tube orifice is closed by the bottom portioniof said bowl, a piston in said cylinder, a tubular piston rod extending outwardly through the head of said cylinder. and terminating in a manually operable head through which the bore in said piston rod communicates with the ambient atmosphere, said bore being adapted to be closed by a finger of the operator during the inward stroke of the piston for forcing a portion of the air 1n said cylinder and rod outwardly through the bore in said stem and the channel in said mouthpiece when said air port and air passage are in registration, the diameter of said tubular piston rod being greater than the diameter of the bore of said bowl and the channel of said mouthpiece.

PETER GUSTAFSON.

REFERENCES CITED The following references are of record in the file of this patent: I A

UNITED STATES PATENTS Number Name Date i 574,956 snycerr Jan. 12 1897 574,202 Ferreira May 14 1901 k951,030 smith Mar. 1l 1910 999,120 Meza, July '25' 1911 1,377,752 con May 10" 1921 2,298,979 Bauentme July 7,J '1942 FOREIGN PATENTS Number Country 17,084 Great Britain 1.3361890 2,655 Greet Britain 199e 26,952 Great Britain of 1903 180,138 Switzerland Dec. 16, 1935 

